Question

4 (a) What is greenhouse effect?

Answer 1

• The greenhouse effect is the way in which heat is trapped close to Earth's surface by “greenhouse gases.” These heat-trapping gases can be thought of as a blanket wrapped around Earth, keeping the planet toastier than it would be without them.
• Greenhouse gases include carbon dioxide, methane, nitrous oxides, and water vapor. (Water vapor, which response physically or chemically to changes in temperature, is called a "feedback.")
• This keeps the earth's surface warm and prevents it from freezing.